Strategy Question: Parent/Child vs 2 Separate listing?

Our amazon shop used to be really successful because it was getting a lot of external traffic. But now the space has been inundated with copycats…and I just have no clue on amazon strategy. I originated on Etsy, and I’m actually an Amazon Handmade seller on Amazon. I’m really struggling on there now.

My question is this – if I have old listings that aren’t performing well anymore, but have a handful of feedback on the listings…is it better to just create a parent/child and add my new variation in there?

The variation is just a horizontal version of a wall calendar that I make. But is it better to put them in a parent/child? Or on their own listings…because organic search wouldn’t display the 2 options organically right? Because what would be the odds of amazon showing the same listing from the same shop owner twice, but just different childs – and above the fold?

Hopefully my question makes sense!